Button-edge-grinding machine.



P. F. DUSHA & A. FEYK.

BUTTON EDGE GRINDING MACHINE.

- APPLICATION FILED AUG. H, 1915.

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BUTTON EDGE GRINDING MACHINE.

APPLICATION FILED AUG.II,19I5.

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PATENT @FFlfiE.

PAUL F. DUSI-IA AND ANTON FEYK, 0F NET/V YORK, N. Y., ASSIGNORS TO HOLUB DUSI-I'A COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF NEW YORK.

BUTTON-EDGE-GRINDING- MACHINE.

Specification of Letters Patent.

Patented May 9, 1916.

To all whom it may concern:

Be it known that we, PAUL F. DUSHA and ANTON Fnrrgcitizens of the United States, and residents of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Button-Edge-Grinding Machine, of which the following is a full, clear, and exact description.

This invention relates to a machine for shaping and finishing the edges of pearl shell and other buttons.

The invention has for its general objects to provide a machine of the character referred to by which the edges of buttons can be ground or cut in various designs in a quick, simple and effective manner.

A more specific object of the invention is the provision'of a button edge grinding machine which embodies a grinding wheel mounted on a movable frame which is oscillated by the joint action of a spring or equivalent means and a pattern which governs the peripheral shape of the button that is being ground in the machine, the set of the grinding wheel carrying frame being adjustable so as to operate on button blanks of various diameters.

Another specific object of the invention is the provision of a head stock having a spindle adapted to be clutched to the driving shaft automatically by longitudinally moving the spindle by the act of clamping a button blank between the spindles of the head and tail stocks.

A further object is to provide a tail stock which is adapted to carry suitable workholding means and which is urged by a spring or equivalent means into work-holding position, there being a treadle-operated device for retracting the spindle of the tail stock so that the work can be removed from the machine.

With such objects in view, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawings which illustrate one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure 1 is a side view of the machine with a portion of the clutch broken away; Fig. 2 is a left-hand end view of Fig. 1; Fig. 3 is a plan view of the head stock portion of the machine; Fig. l is an enlarged sectional view of the spindles of the head and tail stocks and the work-holding means; Fig. 5 is a detail sectional view of a modified form of work-holding means; Fig. 6 is a detail sectional view of the device for adjusting the position of the driving wheel; Fig. 7 is a detail sectional view of the tail stock spindle adjusting means; and Fig. 8

is a v1ew showing different forms of patterns for grinding the buttons.

Referring to the drawing, 1 designates the base of the machine frame A, and rising from the base are bearing pedestals 2 and 3 for the head stock B, and bearing pedestals 4L and 5 for the tail stock G. On the pedestal 2 is a tubular bearing 5 for the main driving shaft 6 on which is mounted a pulley 7 or equivalent means by which power is supplied to the machine. On the shaft is pinned a collar 8 which cooperates.

with the pulley 7 to prevent longitudinal movement of the shaft, the inner end of the latter being provided with pinion teeth 9 that mesh with the teeth ofthe gear wheel 10. The tail stock comprises a spindle 11 journaled in the bearings 12 and 13 for rotation and longitudinal movement, the longitudinal movement being comparatively slight for the purpose of unclutching or clutching the spindle from and to the driving shaft 6. For this purpose there is fastened to the spindle 11 a conical clutch member 14 which enters a hollow conical clutch member 15 which may be made integral with the gear 10, and interposed between these clutch members is a helical spring 16 that tends to throw the movable clutch member 14 to the right, Fig. 1, or out of engagement with the clutch member 15. The clutch is closed by the spindle 11 being moved to the left, this movement being effected by the clamping of the work or button to be ground in the machine. The inner end of the spindle 11 is hollowed out so that in the bore 17 thereof a suitable chuck 18, Fig. 4, or 19, Fig. 5, may be inserted. The outer end of the spindle carries a pattern 20 which may be of any desired form, as shown in Fig. 2, or Fig. 8, the pattern being pro vided with a central opening 21 through whichextends a threaded reduced portion or screw 22 on the spindle, and on this screw is a nut 23 which clamps the pattern against the shoulder or end face 24 of the spindle.

The edge of the button is shaped and finished by a grinding wheel 25 located adjacent the inner end of and behind the head stock spindle 11. This wheel is fastened to a shaft 26 that is journaled in bearings 27 and 28 of a frame D which is pivotally connected at its bottom to the base 1 by a horizontal pivot 29, whereby the cutter or grinding wheel will oscillate with respect to the button and thereby grind the periphery to the desired shape. The oscillation of the frame D is effected by the joint action of a spring 30 and the pattern 20, the spring 30 being of the helical expansion type and having its front end connected with a post 31 and its rear end connected with a tension-adjusting screw 32 carried by the frame D. The spring 30 is under a tension urging the frame D forwardly, but the rearward movement is effected by the pattern 20 on the periphery of which runs a roller 33 carried by an arm 34 which is adjustably connected with the frame D. The arm 34 has an upwardly-extending handle 35 whereby the operator can conveniently move the frame D. The adjustable connection between the frame D and the arm 34 is in the form of a screw 36 threaded in a stud 37 on the frame D, and

the screw has a swiveled connection at 38 with the arm 34, so that by turning the screw the frame can be set forwardly or rearwardly so as to adjust the grinding wheel to operate on buttons of different diameters. The grinding wheel can be axially adjusted by the means shown in Fig. 6. The shaft 26 passes through a sleeve or bushing 39 in the bearing 27, and on the outer end of this sleeveis threaded an adjusting ring 40, which, by being turned, will move the sleeve to the right or left, the sleeve being prevented from turning by a set screw 41 engaging in a longitudinal slot 42 in the sleeve. A washer 43 is fastened to the outer end of the shaft 26 and engages one end of the sleeve 39 while'the other end of the sleeve engages the driving pulley 44 fastened to the shaft 26. It will thus be seen that longitudinal movement of the sleeve 39 will effect a corresponding movement of the wheel shaft 26. Any suitable means may be provided to :prevent the adjusting means 40 from moving axially. One side of the ring bears against the bearing 27, and a lug 45 carried by the bearingengages the opposite side of the ring.

The spindle 46 of the tail stock is longitudinally slidable in the bearings 47 and 48. Surrounding the spindle is a helical compression'spring 49 which has one end engaging the bearing 48 and the other end engaging an adjustable collar 50 threaded on the spindle, whereby the spring urges the spindle toward the left. On the outer end of the spindle is a collar 51 to which is operatively connected the arm 52 of a bellcrank lever 53, the other arm 54 of this lever being engaged by a suitable operating means, such as a lever 55, that is fulcrumed at 56 on the base 1 of the machine, and which is connected by a rod 57 with a treadle or suitable means capable of being actuated by the operator, whereby the downward movement of the end 58 of the lever will throw the opposite end 59 upwardly, whereby the bell-crank lever 53 will swing to the right and retract the spindle 46 of the tail stock by turning the nut 60 on the screw 61 which is connected with and extends axially from the central reduced portion 62 of the spindle 46. The collar 51 surrounds the reduced portion 62 and the screw 61 passes through an opening 63 in the collar. The spring 49 maintains the surface 64 of the collar 51 against the adjacent bearing 48, and by unscrewing the nut 60 the spindle 46 will move toward the head stock While the reverse turning of the nut 60 will draw the spindle 46 to the right. By means of this adjustment various button or work-holding means may be used. As shown in Fig. 4, the tail stock spindle 46 is centrally bored to provide a chamber 65 for holding an auxiliary rotatable spindle 66 that rotates in a ball-bearing 67 and has its inner end engaging a thrust bearing 68. The upper end or head 69 of this spindle is bored and internally threaded to receive various devices employed for clamping and driving various forms and types of buttons, the edges of which are to be ground. A centering socket 70 is shown in Fig. 4 as threaded in the secondary spindle 66, and engaglng 1n the socket 1s a' center point 71 which has a pair of parallel pins 72 that engage in openings 73 of the utton blank 74, such pins also engaging in openings 75 of the chuck member 76 threaded in the chuck 18. The chuck 18 has a conical shoulder 77 which is adapted to frictionally engage a corresponding surface 78in the inner end of the head stock spindle 11. As shown in Figs. 1 and 2 the button 74 is clamped in'the machine so as to rotate with the spindle 11, the spring 49 operating to clutch the chuck 18 tothe spindle 11 and to hold the clutch members 14 and 15 in enbeingdriven by a belt, not shown, passing around the pulley on the grinding wheel shaft. When the edge of the button is ground the operator presse the treadle so as to move the spindle 46 to the right, whereby the chuck 18 is disengaged and the clutch members 1-1: and 15 disconnected. The finished button is now taken out by removing the center point 71, together with the button. A new button is replaced on the center point and the latter applied. to the chuck, the centering socket being held back by the operator holding down the treadle. As soon as the centering point and treadle are in proper position the treadle is released so that the spindle &6 moves to the left and causes the point 71 to engage in the socket 70, the chuck 18 to frictionally engage the spindle 11, and the clutch members 15 and 16 to gage, whereby the spindle 11 is rotated and with it the button 74, which is then ground by the grinding wheel.

For different types of buttons different forms of chuck constructions and cooperating holding means are employed. For instance, as shown in Fig. 5, the button is of the type having a thread passage 81 parallel with the front face 82, and the chuck 19 has a socket 83 for receiving the shank 8st of the button, the socket 83 having lugs 85 which engage the ends of the thread passage 81 so that the button will turn with the chuck 19. The cooperating holding device 86 that is carried by the tail stock spindle has rubber 87 which engages the front face 82 of the button 81 to hold the button in driving engagement with the chuck 19. This chuck 19 is held in the spindle 11 by a set screw 88, Fig. 4.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while we have described the principle of operation, together with the device which we now consider to be the best embodiment, we desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A button edge grinding machine comprising a head stock having a rotatable spindle, means for fastening thereto a button to be ground, a pattern operatively connected to and rotating with the spindle, a grinding wheel, a frame movable back and forth and on which the wheel is mounted, an arm adjustably connected with the frame and operatively related to the pattern, whereby the latter moves the frame in one direction, yielding means operating on the frame to move the same in the other direction, and means for adjusting the position of the arm with respect to the frame, said frame and arm being mounted at the same side of the spindle as the grinding wheel.

2. A button edge grinding machine comprising a head stock including a rotatable spindle, means for clamping thereto abut ton to be ground, a pattern operatively connected to and rotated with the spindle, a swinging frame mounted on the head stock, an arm also pivotally mounted on the head stock, a roller carried by the arm and engaging the pattern, a screw connected with the arm and frame for adjusting the position of the latter with respect to the spindle, yielding means acting on the frame for urging the same toward the spindle, and a grinding wheel carried by the frame, said frame, arm and screw being disposed at the same side of the spindle as the grinding wheel.

3. A. button edge grinding machine comprising a spindle for rotating the button to be ground, a driving shaft, a normally open clutch adapted to be closed by longitudinal movement of the spindle for connecting the same with the driving shaft, a pattern connected with the spindle, a grinding wheel, a frame movably supporting the grinding wheel, means whereby the movable frame is controlled by the pattern. a tail stock spindle cooperating with the first-mentioned spindle to clamp a button to be ground, means urging the tail stock spindle toward the head stock spindle to move the latter and close the clutch, and means adapted to be manually actuated for retracting the tail stock spindle to release the button and to permit the clutch to open.

4. A button edge grinding machine comprising a spindle for holding a button to be ground, a grinding wheel movable toward and from the spindle to grind the button, a carrier movably supporting the wheel, a shaft movable in the carrier and to which the wheel is fastened, means for longitudinally adjusting the shaft in the carrier, a tail stock spindle cooperating with the firstmentioned spindle to clamp a button to be ground, mean urging the tail stock spindle toward the head stock spindle to move the latter and close the clutch, and means adapted to be manually actuated for retracting the tail stock spindle to release the button and to permit the clutch to open.

5. A button edge grinding machine comprising a rotatable head stock spindle for rotating the button to be ground, a driving shaft, a normally open clutch between the spindle and shaft and arranged to be closed by limited longitudinal movement of the spindle, a tail stock spindle cooperating with the first-mentioned spindle for clamping the button to be ground, means urging the tail stock spindle toward the head stock spindle to clamp the button and to close the clutch, and means adapted to be actuated by the operator for retracting the tail stock spindle for releasing the button and for permitting said clutch to open.

6. A button edge grinding machine comprising a rotatable head stock spindle for rotating the button to be ground, a driving shaft, a normally open clutch between the spindle and shaft and arranged to be closed bv limited longitudinal movement of the spindle, a longitudinally movable tail stock spindle, a spring urging the, latter spindle toward the head stock spindle for gripping the button between the spindles and for closing the clutch, and a treadle device for moving the spindle against the tension of the said spring for releasing the button and for permitting the clutch to open.

7. A button edge grinding machine oom- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

prising a rotatable head stock spindle for rotating the button to be ground, a driving shaft, a normally open clutch between the spindle and shaft and arranged to be closed by limited longitudinal movement of the spindle, a longitudinally movable tail stock spindle, a spring urging the latter spindle toward the head stock spindle for gripping the button between the spindles and for closing the clutch, and means for adjusting the position of the tail stock spindle with respect to the head stock spindle.

In testimony whereof we have signed our names to thisspecification in the presence of two subscribing witnesses.

PAUL F. DUSHA. ANTON FEYK.

Witnesses ADOLPH TVRDY, ZDENEK Porrn.

Washington, D. C. 

